We have a 2011 Newmar which came with a Thetford toilet Model #34457. It is leaking in the back but cannot find any information on the internet about this particular model. It only leaks when you flush. (Floor pedal model) Because of the tight space in back of the toilet it is hard to tell exactly where the leak is. There are not to many parts back there. Is there a kit that would fix my problem and where can I get it. I'm in Mission, Texas.